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Return the contained value, if present, otherwise throw an exception to be
created by the provided s
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Allows reading from and writing to a file in a random-access manner. This is
different from the uni-
- Collections (java.util)
This class consists exclusively of static methods that operate on or return
collections. It contains
- GregorianCalendar (java.util)
GregorianCalendar is a concrete subclass of Calendarand provides the standard
calendar used by most
- ResourceBundle (java.util)
ResourceBundle is an abstract class which is the superclass of classes which
provide Locale-specifi
- BlockingQueue (java.util.concurrent)
A java.util.Queue that additionally supports operations that wait for the queue
to become non-empty
- CountDownLatch (java.util.concurrent)
A synchronization aid that allows one or more threads to wait until a set of
operations being perfor
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